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胡其波 《煤炭加工与综合利用》2002,(2):33-35
介绍盘北选煤厂重介旋流器选煤工艺的生产调试经验和技术改造的情况 ;该厂生产实践证明 ,经过技术改造后 ,重介旋流器精选工艺系统运行可靠 ,精煤质量稳定 ,介耗比全原煤重介工艺低。 相似文献
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从日常生产维护出发,通过技术改造解决了装置需停蒸发系统才能倒运熔融尿液泵的难题,通过在线倒运熔融尿液泵,缩短了倒运时间,避免了蒸发长时间打循环,减少成品缩二脲的生成,降低了蒸汽耗量和CO2耗量,提高了产品质量合格率,降低了生产成本。 相似文献
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该文介绍了具有120年供水历史的上海杨树浦水厂的创建和发展、供水现状与技术管理,以及为提高水质和供水可靠性采取的技术和管理措施。 相似文献
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《分离科学与技术》2012,47(6):1179-1191
Abstract Calculation of water flux in a spiral ultrafiltration element was conducted by the novel proposed method, in which all necessary parameters were determined solely from membrane sheet test. By comparing water flux of the commercial element with the data from membrane sheet measurement, this study found that the tendency of water flux variation with time in the membrane element was similar to that which occurred in the membrane sheet, including the consideration of scale‐up effect due to hydrodynamics influence. Therefore, it is possible to express the variation of water flux in the membrane element based on the results from membrane sheet measurement using a practical water source. Surface water and sea water were separately employed to carry out a pilot test with an 8‐inch spiral membrane element, made of polyvinylidene fluoride(PVDF) with a molecular weight cut‐off of 150 kDa, and water fluxes under various transmembrane pressures. Calculations were approximate agreement with that of the pilot test, which enables us believe that the proposal method is reliable for designing a practical ultrafiltration system. 相似文献
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